From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suman Anna Subject: Re: [PATCH] ARM: AM33xx: PRM: Remove wrongly defined RSTST offset for PER Domain Date: Tue, 21 Jun 2016 17:25:52 -0500 Message-ID: <5769BEF0.4040902@ti.com> References: <1466503706-5292-1-git-send-email-j-keerthy@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1466503706-5292-1-git-send-email-j-keerthy@ti.com> Sender: linux-kernel-owner@vger.kernel.org To: Keerthy , rnayak@codeaurora.org, tony@atomide.com Cc: linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, t-kristo@ti.com, afzal@ti.com, d-gerlach@ti.com, paul@pwsan.com, linux@armlinux.org.uk List-Id: linux-omap@vger.kernel.org Hi Keerthy, On 06/21/2016 05:08 AM, Keerthy wrote: > As per the TRM: http://www.ti.com/lit/ug/spruh73m/spruh73m.pdf > offset 0x4 is reserved for PRM_PER. Hence removing the wrongly > defined address offset. Thanks for the patch. These macros are not used anywhere, so it should be safe to remove these. I have tested this patch with an off-tree PRUSS driver releasing the reset, it works as expected without throwing any issues. That said, the current omap_hwmod code assumes default rstst_offs and st_shift and tries to still write some value into the RSTCTRL register in am33xx_prm_deassert_hardreset(), but it didn't have any side-affects though on AM33xx. This is what affected the AM437x due to incorrect RSTST offset value. That behavior is independent of this patch though. Tested-by: Suman Anna regards Suman > Signed-off-by: Keerthy > --- > arch/arm/mach-omap2/prm33xx.h | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/arch/arm/mach-omap2/prm33xx.h b/arch/arm/mach-omap2/prm33xx.h > index 2bc4ec5..66302c6 100644 > --- a/arch/arm/mach-omap2/prm33xx.h > +++ b/arch/arm/mach-omap2/prm33xx.h > @@ -52,8 +52,6 @@ > /* PRM.PER_PRM register offsets */ > #define AM33XX_RM_PER_RSTCTRL_OFFSET 0x0000 > #define AM33XX_RM_PER_RSTCTRL AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0000) > -#define AM33XX_RM_PER_RSTST_OFFSET 0x0004 > -#define AM33XX_RM_PER_RSTST AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0004) > #define AM33XX_PM_PER_PWRSTST_OFFSET 0x0008 > #define AM33XX_PM_PER_PWRSTST AM33XX_PRM_REGADDR(AM33XX_PRM_PER_MOD, 0x0008) > #define AM33XX_PM_PER_PWRSTCTRL_OFFSET 0x000c >